Adjustable drill-frame.



Patented Oct. I, I90l'.

W. F. REABDON.

ADJUSTABLE DRILL FRAME.

(Apphafxon filed June 25 1901 INVENTOR, WIT Rwandan,

(No Model.)

WITNESSES:

Attorneys,

UNITED STATES PATENT ()FFICE.

WILLIAM F. REARDON, OF RICHMOND, VIRGINIA.

ADJUSTABLE DRl LL-FRAM E.

SPECIFICATION forming part of Letters Patent No. 683,797, dated October 1, 1901.

Application filed June 25, 1901. Serial No. 65,935. (No model.)

T0 at whom, it may concern:

Be it known that I, WILLIAM F. REARDON, a citizen of the United States of America, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Adjustable Drill-Frames, of which the following is a specification, reference being had to the accompanying drawings, in which Figure 1 is a cross-section of a boiler, showing my device attached thereto in an upright position; Fig. 2, a side elevation of a portion of a boiler, showing the device attached to the side of the boiler in line with the steamdome; Figs. 3 and 4, views showing the device applied to different parts of a boiler; Figs. 5 and 6, detail views showing the means for adjustably locking the hinged abutment employed for short hand-drills, as shown most particularly in Fig. 4; and Fig. 7, a detail side elevation of the lower or foot portion of the drill-frame.

The object of this invention is to provide simple devices for clamping and readily adj usting a drill-frame to various positions upon a locomotive or other boiler and to adapt the frame for the reception of the well-known pneumatic or power drills and the shorter hand-drills, as more fully hereinafter set forth.

Referring to the drawings by referenceletters, a. designates a U-shaped frame, preferably formed T-shaped in cross-section and having each of its extremities provided with a foot-bar b, riveted to it and adapted to bear upon and engage the exterior of the boiler. The legs or uprights of this frame are connected to each other at a point near the feet by a strong loop a, which engages notches in the legs and prevents the legs spreading when tension is put upon the clamping-chain d.

The drill e is clamped between the boiler and the top cross-bar f of the frame by means of its clamp-screw g, which latter bears directly against the bar f where power-drills of the pneumatic kind are employed, as shown in Figs. 1, 2, and 3, and against an adjustable cross-bar or abutment h where a shorter hand-drill is employed, as shown in Fig. 4. The supplemental cross-bar his hinged at one end to a loop t, slidingly mounted on one of the uprights of the drill-frame, and is locked in its adjusted position by means of bolts or pins j and 70, the former of which are attached rigidly to the cross-bar at its hinge end and the others are slidingly attached to the crossbar at its free end, said bolts being adapted to engage a series of corresponding holes formed in the uprights on opposite sides of their respective flanges. When this supple- .mental cross-bar is not in use, as is the case where power-drills are employed, it is allowed to swing down against the upright carrying the loop t. When it is desired to employ this cross-bar as a supplemental abutment, it is swung up to the position shown in Fig. 4 and locked at the desired point by the bolts j and 76, the former bolts entering the recesses or holes in the upright carrying the loop 6 and the bolts 7t being inserted or directed into the corresponding pair of openings in the opposite upright. The bolts j are inserted in their openings by the mere raising of the bar; but bolts 76 have to be directed by hand into the proper openings, and it is preferred that the bolts it be actuated by a spring Z.

It will be observed that by providing a series of holes in the uprights and by employ ing the sliding loop to which one end of the bar 2' is hinged it will be a simple matter to adjust the bar for drills of various lengths.

The clamp-chain d is detachably connected at one end to a hook m, pivotally connected to the flange on one of the uprights near its lower end, and its other end is provided with a loop especially adapted to detachably engage in one of the notches in the upper edge of a link n, pivotally attached to a lever 0, this lever being pivoted at its lower end below link 'n to an ear or lug p, riveted to the lower end of the adjacent upright. This lever 0 is adapted to swing toward and away from the adjacent upright and in the same plane therewith, and to lock it in its adjusted positions and maintain a tension on the chain a notched segment (1 is employed, which is pivotally attached to the adjacent upright and works through an opening in the lever, a suitable spring-actuated pawl r being carried by the lever to engage in notches in the upper edge of the segment.

To clamp the drill-frame to the boiler, the clamp-chain is engaged at one end to hook m ICO and is passed around theboiler and engaged at its other end with link n. Then after the drill-frame is adjusted to a position over the point to be drilled the lever 0 is swung inward toward the drill-frame until the proper tension is brought upon the chain. Then the drill is placed in the frame and properly centered, the top crossbar or the supplemental cross-bar it being employed, according as a long power-drill or a shorter hand-drill is to be used.

WVhere the drill-frame is employed on the side of the boiler in line with the dome, as shown in Fig. 2, I employ a supplemental chain d, attached to the main chain and adapted to pass around the dome in the opposite direction from the main chain, and where the drill-frame is to be adjusted to drill holes at the junction of the fire-box and the boiler proper, as shown in Fig. 3, the hook m is disengaged from where it is shown attached in Fig. 1 and moved upward or outward on the upright and engaged in a supplemental hole 772- in order that the frame will be properly steadied. 7

It will be observed that my apparatus is very light and strongin construction, the connecting rod or loop 0 enabling sufficient tension to be put on the chain to secure the clamp-frame against movement in any direction without spreading the uprights of the frame. It will be seen also that by employing a lever device of the sort shown the apparatus may be clamped in place with a minimum of elfort and with the utmost expedition, it requiring but a simple movement of the lever, which can be accomplished in a second of time. It will be observed, further, that an essential feature lies in the employment of an adjustable supplemental crossbar, whereby drills of various lengths and styles may be employed.

Having thus fully described my invention, What I claim, and desire to obtain by Letters Patent, is-

1. In an apparatus of the sort described, the combination of a U-shaped frame adapted to hear at its extremities on a boiler, means for connecting its extremities to prevent spreading, a clamp-chain engaging one of the uprights of the frame near its lower end and adapted to pass around the boiler, and a tightening device connecting the other end of the chain to the opposite upright, near its lower on 2. In combination with a U-shaped frame, a clamp-chain connected to one of the uprights thereof near its lower end, and means connecting the other end. of the chain to the other upright, said means consisting of a lever pivoted at its lower end to the lower end of latter upright and adapted to swing toward and away from the same, means for adj ustably connecting this lever to the end of the chain, a notched segment connected to the upright, and means on the lever forentially as set forth.

3. In combination with a U-shaped frame I and means for clamping it to a boiler, a supplemental abutment or cross-bar extending across the frame below its permanent cross-bar and means for adj ustably locking this cross-bar at various points along the uprights.

4. In combination, a drill-frame, a clampchain, means for attaching one end of this chain adjustably to one of the uprights, this means consisting of a hook m and a series of openings in the upright, and means for tightening the chain.

5. In combination, a drill-frame, a clampchain adapted to pass around the boiler and connected at its extremities to the drill-frame, and a supplemental chain cl connected to the main chain and adapted to engage around the steam-dome ofthe boiler.

6. In combination with a U-shaped frame, adapted to bear at its extremities on a boiler, means connecting the extremities to prevent spreading, said means consisting of a loop 0 embracing the extremities of the uprights and engaging in notches therein, a clamp-chain connected at one end to one of the uprights, and means for adjustably connecting the other end of the chain to the other upright.

'7. In combination with a U-frame having its extremities adapted to bear upon the surface of the boiler, a clamp-chain having one end connected to the extremity of one of the uprights, and means connecting the other end of the chain to the other upright, said means consisting of a lever pivoted at its lower end to the lower end of the upright and adapted to swing to and from the upright and in the same plane therewith, this lever carrying a notched link adapted to adjustably connect with the end of the chain, a notched segment connected to the upright above the pivotal point of the lever and projecting outward past the lever, and a spring-pawl on the lever adapted to engage said segment and lock the lever in its adjusted position.

8. In combination with a U -frame and means for clamping it to a boiler, a removable supplementalabutment connecting the uprights of said frames at a point below the permanent cross-bar connecting said uprights.

9. In combination with a U-frame and means for clamping it to a boiler, a supplemental cross-bar extending across the frame below its permanent cross-bar, means for hinging one end of this supplemental cross bar to one of the uprights, whereby the supplemental cross-bar, may fold against said upright, and means for locking the free end of the supplemental cross-bar to the other upright.

10. In combination with a U -frame and means for clamping it to a boiler, a supplemental abutment adapted to connect the up-- IIO rights of the frame below the permanent In testimony whereof I hereunto affix my cross-bar, means for adj ustably hinging one signature, in the presence of two witnesses, 10 end of this supplemental abutment to one this 22d day of June, 1901.

upri ht said means consistin of a loop em- 5 bracing one of the uprights and connected WILLIAM REARDON' to the end of the abutment by a hinge-joint, Witnesses:

and means connecting the other end of the JOHN B. BLILEY,

abutment to the other upright. E. B. MCENEANY. 

